Definitions:

SDR RX w/ demod = "SDR RX":

Remote receiver
Receiver connected to a pc for receiving and demodulating -> SDR
Audio is sent via network to station for further processing / listening

SDR RX w/o demod = "SDR RX IQ"

Remote receiver
only selectes band limited part of HF spectrum
Sends I/Q over network to station
Frequency selection and demodulation happens in station (software on pc)
Could be converted back to HF in station

RFoF

Remote antenna + RFoF converter
entire HF spectrum upconverted to CATV adaptor frequency range (~ 50-600 MHz)
No sampling / band limiting at RX site
RX in station with SDR or downconverter + normal RX

Requirements

SDR RX

Finding and optimizing latency problems (buffer)
Good Network connection (Wifi direct link or over 0xFF)
PLEASE ADD MORE

SDR RX IQ

Same as "SDR RX"
PLEASE ADD MORE

RFoF

Dark fiber to station
upconverter at RX site
possibly downconverter at station for use with normal RX + RX/TX Switch to protect RFoF Receiver
SDR at station for waterfall view

Comparing RFoF to remote SDR RX

Comparison on requirements and possibilities using RFoF or a remote SDR receiver.

Fiber:
- RX site may have slightly higher than ideal QRM (Lustbühel? Inffeldgasse roof?)
- low latency and direct spectrum access is worth not having ideal RX conditions
Network / remote SDR RX
- RX site should have lowest possible QRM, network is much easire available than dark fiber
- Latency should be very low (optimizing software is necessary)
- Network connection should be exclusive or at least better than LTE (direct WiFi link? 0xFF?)

Link collection:

https://www.aliexpress.com/item/1005004469195950.html https://www.aliexpress.com/item/1005003386290408.html